11806401329 has 2 divisors, whose sum is σ = 11806401330. Its totient is φ = 11806401328.

The previous prime is 11806401311. The next prime is 11806401337. The reversal of 11806401329 is 92310460811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11392360225 + 414041104 = 106735^2 + 20348^2 .

It is an emirp because it is prime and its reverse (92310460811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11806401329 - 2⁸ = 11806401073 is a prime.

It is a super-2 number, since 2×11806401329² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11806401359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5903200664 + 5903200665.

It is an arithmetic number, because the mean of its divisors is an integer number (5903200665).

Almost surely, 2^11806401329 is an apocalyptic number.

It is an amenable number.

11806401329 is a deficient number, since it is larger than the sum of its proper divisors (1).

11806401329 is an equidigital number, since it uses as much as digits as its factorization.

11806401329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 35.

The spelling of 11806401329 in words is "eleven billion, eight hundred six million, four hundred one thousand, three hundred twenty-nine".